DE3888418D1 - PRML-Kodierung. - Google Patents
PRML-Kodierung.Info
- Publication number
- DE3888418D1 DE3888418D1 DE88108140T DE3888418T DE3888418D1 DE 3888418 D1 DE3888418 D1 DE 3888418D1 DE 88108140 T DE88108140 T DE 88108140T DE 3888418 T DE3888418 T DE 3888418T DE 3888418 D1 DE3888418 D1 DE 3888418D1
- Authority
- DE
- Germany
- Prior art keywords
- prml
- coding
- prml coding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M5/00—Conversion of the form of the representation of individual digits
- H03M5/02—Conversion to or from representation by pulses
- H03M5/04—Conversion to or from representation by pulses the pulses having two levels
- H03M5/14—Code representation, e.g. transition, for a given bit cell depending on the information in one or more adjacent bit cells, e.g. delay modulation code, double density code
- H03M5/145—Conversion to or from block codes or representations thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/497—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by correlative coding, e.g. partial response coding or echo modulation coding transmitters and receivers for partial response systems
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/078,731 US4786890A (en) | 1987-07-28 | 1987-07-28 | Method and apparatus for implementing a PRML code |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3888418D1 true DE3888418D1 (de) | 1994-04-21 |
DE3888418T2 DE3888418T2 (de) | 1994-10-06 |
Family
ID=22145889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3888418T Expired - Fee Related DE3888418T2 (de) | 1987-07-28 | 1988-05-20 | PRML-Kodierung. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4786890A (de) |
EP (1) | EP0301191B1 (de) |
JP (1) | JPH01119120A (de) |
CA (1) | CA1308811C (de) |
DE (1) | DE3888418T2 (de) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4888779A (en) * | 1988-03-18 | 1989-12-19 | International Business Machines Corporation | Matched spectral null trellis codes for partial response channels |
US4888775A (en) * | 1988-03-18 | 1989-12-19 | International Business Machines Corporation | Trellis codes for partial response channels |
DE68920739T2 (de) * | 1989-08-16 | 1995-06-29 | Ibm | Daten-Kodierung für den Sofortstart von PRML-Empfängern. |
US5220466A (en) * | 1991-05-21 | 1993-06-15 | International Business Machines Corporation | Method and apparatus for digital filter control in a partial-response maximum-likelihood disk drive system |
US5243605A (en) * | 1991-07-11 | 1993-09-07 | Storage Technology Corporation | Modified viterbi detector with run-length code constraint |
US5327440A (en) * | 1991-10-15 | 1994-07-05 | International Business Machines Corporation | Viterbi trellis coding methods and apparatus for a direct access storage device |
US5196849A (en) * | 1992-01-31 | 1993-03-23 | International Business Machines Corporation | Method and apparatus for implementing PRML codes with maximum ones |
US5257272A (en) * | 1992-04-15 | 1993-10-26 | International Business Machines Corporation | Time-varying modulo N trellis codes for input restricted partial response channels |
US5255131A (en) * | 1992-08-13 | 1993-10-19 | International Business Machines Corporation | Asynchronous servo identification/address mark detection for PRML disk drive ssytem |
JP2648554B2 (ja) * | 1992-08-13 | 1997-09-03 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Prmlディスク駆動システムの非同期ゲイン調整方法および装置 |
US5260703A (en) * | 1992-08-27 | 1993-11-09 | Quantum Corporation | Data encoding and decoding within PRML class IV sampling data detection channel of disk drive |
US5343340A (en) * | 1992-12-31 | 1994-08-30 | International Business Machines Corporation | Digital servo signal demodulation method and apparatus utilizing a partial-response maximum-likelihood (PRML) channel in a disk file |
US5424881A (en) | 1993-02-01 | 1995-06-13 | Cirrus Logic, Inc. | Synchronous read channel |
US5353170A (en) * | 1993-05-19 | 1994-10-04 | International Business Machines Corporation | Error recovery data storage system and method with two position read verification |
JPH07220398A (ja) * | 1994-02-03 | 1995-08-18 | Fujitsu Ltd | 記録信号再生方法及びその装置 |
US5619539A (en) * | 1994-02-28 | 1997-04-08 | International Business Machines Corporation | Data detection methods and apparatus for a direct access storage device |
US6002538A (en) * | 1994-03-18 | 1999-12-14 | Fujitsu, Ltd. | PRML regenerating apparatus having adjusted slice levels |
DE19549400B4 (de) * | 1994-03-18 | 2008-02-07 | Fujitsu Ltd., Kawasaki | PRML-Regenerationsvorrichtung |
US5576707A (en) * | 1994-06-10 | 1996-11-19 | Cirrus Logic, Inc. | Method and apparatus for detecting and decoding data in a PRML class-IV digital communication channel |
US5544178A (en) * | 1994-06-10 | 1996-08-06 | Cirrus Logic, Inc. | Method and apparatus for encoding data in a PRML class-IV digital communication channel |
US5671252A (en) * | 1994-09-21 | 1997-09-23 | Analog Devices, Inc. | Sampled data read channel utilizing charge-coupled devices |
JP3456781B2 (ja) | 1995-02-06 | 2003-10-14 | 富士通株式会社 | 磁気記録再生装置の復調回路 |
KR100288672B1 (ko) * | 1995-09-18 | 2001-05-02 | 포만 제프리 엘 | 노이즈예측최대근사검출을위한장치및방법 |
US5790571A (en) * | 1995-12-11 | 1998-08-04 | Seagate Technology, Inc. | Coding data in a disc drive according to a code having desired algebraic characteristics |
US5949831A (en) * | 1997-05-21 | 1999-09-07 | International Business Machines Corporation | Method and apparatus for data detection for PRML data channels |
KR100450782B1 (ko) * | 1997-08-27 | 2004-11-16 | 삼성전자주식회사 | 고밀도 데이타 저장기기를 위한 피알엠엘 코드의 부호화 및복호화 방법 |
KR100281738B1 (ko) | 1998-07-13 | 2001-02-15 | 이계철 | 니블 반전 및 블록 반전 부호의 부호화 및 복호화 방법, 그 부호 및 복호장치 |
US6158027A (en) * | 1998-08-31 | 2000-12-05 | International Business Machines Corporation | Enhanced noise-predictive maximum likelihood (NPML) data detection method and apparatus for direct access storage device (DASD) |
US6175457B1 (en) | 1998-10-06 | 2001-01-16 | International Business Machines Corporation | Dual polarity thermal asperity detector for direct access storage device (DASD) |
US6137643A (en) * | 1998-10-06 | 2000-10-24 | International Business Machines Corporation | Thermal asperity detection with long magnet rejection for direct access storage device (DASD) |
US6430713B1 (en) | 1999-06-30 | 2002-08-06 | International Business Machines Corporation | System and method for constructing low complexity block coders |
IT1316796B1 (it) * | 2000-03-09 | 2003-05-12 | St Microelectronics Srl | Dispositivo circuitale per recuperare la simmetria di un segnaleanalogico ricavato da una lettura di dati da supporti magnetici |
KR100384886B1 (ko) * | 2000-10-10 | 2003-05-22 | 주식회사 케이티 | 니블 반전 부호 활용 방법 및 그 장치 |
US7142134B2 (en) * | 2005-02-01 | 2006-11-28 | Hitachi Global Storage Technologies Netherlands B.V. | Techniques for generating modulation codes using running substitutions |
JP6768739B2 (ja) | 2018-05-22 | 2020-10-14 | 矢崎総業株式会社 | 防水コネクタ及び防水コネクタ構造 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4567464A (en) * | 1983-01-28 | 1986-01-28 | International Business Machines Corporation | Fixed rate constrained channel code generating and recovery method and means having spectral nulls for pilot signal insertion |
JPS6048645A (ja) * | 1983-08-29 | 1985-03-16 | Sony Corp | 情報変換装置 |
JPH0721942B2 (ja) * | 1984-10-11 | 1995-03-08 | ソニー株式会社 | チヤンネル符号化方法 |
US4707681A (en) * | 1986-04-24 | 1987-11-17 | International Business Machines Corporation | Method and apparatus for implementing optimum PRML codes |
-
1987
- 1987-07-28 US US07/078,731 patent/US4786890A/en not_active Expired - Lifetime
-
1988
- 1988-05-20 EP EP88108140A patent/EP0301191B1/de not_active Expired - Lifetime
- 1988-05-20 DE DE3888418T patent/DE3888418T2/de not_active Expired - Fee Related
- 1988-05-20 JP JP63122235A patent/JPH01119120A/ja active Granted
- 1988-07-15 CA CA000572185A patent/CA1308811C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE3888418T2 (de) | 1994-10-06 |
EP0301191A2 (de) | 1989-02-01 |
CA1308811C (en) | 1992-10-13 |
EP0301191A3 (en) | 1990-07-04 |
JPH01119120A (ja) | 1989-05-11 |
JPH0319735B2 (de) | 1991-03-15 |
US4786890A (en) | 1988-11-22 |
EP0301191B1 (de) | 1994-03-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |